From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 69F89385840F; Thu, 8 Feb 2024 09:13:37 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 69F89385840F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1707383617; bh=IZpD0jbg8reL82TNBneE5O5uohV6E8k3SYzPNT4MwZA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=mCdmEDOn84sMvgNLKpcU71AFrKzj2rbuwuGUhjIgIchrHTolf4oPm+CmOEAO5PeL6 kKUK2oMfGLmb1CggJGwYn353lS/g5tvi2OKxuVUKRkBdpU57lLoHTcHM4lKN+gjF0H ThcDdlsATP8lMGdioW36uSOT4jQu4x/P2JIzaJNE= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/113811] std::rotate does 64-bit signed division Date: Thu, 08 Feb 2024 09:13:36 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 13.1.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113811 --- Comment #1 from Richard Biener --- In case __n is the minimum signed integer and __k is -1 the division would = also trap ;) So yes, they should be unsigned.=